Results 171 to 180 of about 451,064 (205)

An unusual travelling disturbance in the F-region of the ionosphere

Journal of Atmospheric and Terrestrial Physics, 1965
Abstract A series of ionograms showing satellite traces has been interpreted in terms of a large in verted-trough disturbance travelling in the F-region overhead. Some details of the shape of the disturbance, which resembled a breaking wave in cross-section, have been worked out.
D.C. Baker, J.A. Gledhill
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Traveling ionospheric disturbances observed at the magnetic equator

Journal of Geophysical Research, 1971
Traveling ionospheric disturbances at magnetic equator, determining electron concentration profiles by incoherent scatter ...
D. L. Sterling, W. H. Hooke, R. Cohen
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Incoherent scatter observations of traveling ionospheric disturbances

Journal of Geophysical Research, 1964
The incoherent scatter technique is used to study large-scale traveling ionospheric disturbances above Puerto Rico. Below the F-region maximum the measurements of disturbance amplitude, period, and direction of phase progression with time (downward) are consistent with the bottomside results of other workers. Above the maximum, however, the surfaces of
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Traveling ionospheric disturbances associated with nuclear detonations

Journal of Geophysical Research, 1967
The analysis of ionospheric data taken from 54 ionosonde observatories throughout the world indicates the presence of several traveling ionospheric disturbances originating from the five high-altitude nuclear tests conducted over Johnston Island in 1962.
W. J. Breitling, R. A. Kupferman, G. J. Gassmann   +2 more
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Traveling ionospheric disturbances near London, Canada

Journal of Atmospheric and Solar-Terrestrial Physics, 2009
Abstract Observations of medium scale traveling ionospheric disturbances (TIDs) from near London, Canada (43°N, 81°W geographic) using spaced transmitter technique at 4 MHz have been done for 1 1 2 years. Most of the best data are for daytime TIDs because of the use of 4 MHz.
J.W. MacDougall, G. Li, P.T. Jayachandran   +2 more
exaly   +2 more sources

Analysis of large-scale traveling ionospheric disturbances

Journal of Geophysical Research, 1964
It is shown that an acoustic-gravity wave interpretation of Chan and Villard's observations of large-scale traveling ionospheric disturbances is consistent with theory. By using the dispersion curves and kinetic energy profiles for atmospheric gravity waves recently computed by Pfeffer and Zarichny, Pfeffer and Gersten, and earlier by Press and ...
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HF Doppler studies of traveling ionospheric disturbances

Journal of Atmospheric and Terrestrial Physics, 1968
Abstract Wavelike ionospheric motions observed with a network of CW Doppler sounders are analyzed and found to fall into four separate classes not previously distinguished. The motions of each type are attributed to various kinds of atmospheric waves that interact with the ionosphere.
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A theory of medium-scale traveling ionospheric disturbances

Journal of Geophysical Research, 1974
Analysis of the excitation of atmospheric gravity waves leads to a hypothesis concerning the nature of medium-scale traveling ionospheric disturbances (TID's) and their relation to large-scale TID's. Stationary phase techniques are used to derive the asymptotic fluctuations of velocity and electron density generated by a line source (e.g., the auroral ...
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Occurrence of Giant Travelling Ionospheric Disturbances at Night

Nature, 1959
A RECENT publication1 from this laboratory has discussed the existence of large travelling ionospheric disturbances which during winter daylight hours travel from south to north over the east coast of Australia. This type of disturbance first described by Munro and Heisler2 has been tracked from Hobart to Townsville, a distance of 3,000 km.
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Traveling ionospheric disturbances?A review

Radiophysics and Quantum Electronics, 1968
B. N. Gershman, G. I. Grigor'ev
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